qmk/qmk_firmware

[Bug] Unable to release using Mod Tap

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#24,951 opened on Feb 24, 2025

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bughelp wanted

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Description

Describe the Bug

  1. set MT(MOD_LGUI,KC_S)、MT(MOD_LSFT,KC_F)
  2. Long press S and F，then press other key，for P
  3. release P，then release S and F.
  4. Unable to release P

Image

Keyboard Used

qmk

Link to product page (if applicable)

No response

Operating System

No response

qmk doctor Output

Is AutoHotKey / Karabiner installed

  • AutoHotKey (Windows)
  • Karabiner (macOS)

Other keyboard-related software installed

1.0.4

Additional Context

No response

Contributor guide

Research direction
Examine the Mod Tap implementation in quantum/action tapping.c, particularly the logic for releasing keys when multiple Mod Taps are held. Trace the state transitions for mods and tap keys.
Tech stack
c
Domain
embedded iot
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
CQMK Basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35